Cedar Rapids, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.7 °C (low) to 15 °C (high). Annual precipitation averages 988.1 Millimeters. Cedar Rapids is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.3 °C | -1.9 °C | 30.73 mm |
| February | -9.2 °C | 0.6 °C | 35.56 mm |
| March | -3 °C | 7.9 °C | 54.61 mm |
| April | 3.2 °C | 16.1 °C | 98.81 mm |
| May | 9.7 °C | 22.1 °C | 121.92 mm |
| June | 15.4 °C | 27.2 °C | 141.73 mm |
| July | 17.3 °C | 28.8 °C | 113.54 mm |
| August | 15.9 °C | 27.9 °C | 111.76 mm |
| September | 11.2 °C | 24.5 °C | 101.09 mm |
| October | 4.6 °C | 17.3 °C | 75.69 mm |
| November | -2 °C | 8.4 °C | 58.93 mm |
| December | -7.8 °C | 1.1 °C | 43.69 mm |
| Annual | 3.7 °C | 15 °C | 988.06 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |